The usual antagonists in the Transformers Universe, the Decepticons follow a philosophy of accruing power through military strength and conquest. The Decepticon army is currently split between the followers of Megatron and those who still obey Gigatron.

• Decepticon Leader: Gigatron
• Field Commander: Scorponok
• Special Projects: Cyclonus
• Mayhem Attack Squad Leader: Bludgeon
• Staff Officer: Skullgrin
• Intelligence Director: Wingspan
• Communications Officer: Squawktalk
• Watch Commander: Barricade
• Mayhem Attack Squad: Black Battle Convoy, Fangry, Octopunch, Sixshot, Stranglehold
• Ground Pounders: Gimlet, Grader, Graft, Grapeshot, Grapnel, Gravel, Grenade, Gridiron, Grill, Grindstone, Groundwork
• Troops: Barrage, Blot, Browning, Bug Bite, Crankcase, Cutthroat, Deluge, Excavator, Flattop, Flywheels, Great Cannon, Growl, Hooligan, Horri-Bull, Hun-Grrr, Iguanus, 'Jury Rig', Leyland, Nightflight, Octane, Rippersnapper, Roadblock, Ruckus, Sandstorm, Shuttle Gunner, Sinnertwin, Skyhopper, Skullcruncher, Skystalker, Slugslinger, Snapdragon, Stormcloud, Submarauder, Tailwind, Target Hawk, Whisper, Venom

• Aerospace Commander: Spinister
• Field Commander: Weirdwolf
• Crew: Hyperdrive, Needlenose, Pounce, Triggerhappy

• Captain: Leozak
• Assault Base: Trypticon
• Crew: Drillhorn, Gaihawk, Hellbat, Jalgar, Killbison, Wipe-Out

• Decepticon Leader: Megatron
• Chief Administrator: Astrotrain
• Chief of Operations: Soundwave
• Aerospace Commander: Tracer
• Darkmount Security Director: Shrapnel
• Kaon Garrison Commander: Galestorm
• Chief Engineer: Scrapper
• Chief Surgeon: Hook
• Technical Staff: Bonecrusher, Gravedigger, Heavy Load, Hightower, Long Haul, Mixmaster, Scavenger
• Intelligence Staff: Blackjack, Bombshell, Buzzsaw, Garboil, Howlback, Kickback, Laserbeak, Ravage, Retcon, Wingthing
• Ground Troops: Battletrap, Blitzwing, Bombshock, Breakdown, Bulletbike, Cindersaur, Clench, Dead End, Detour, Divebomb, Drag Strip, Finback, Flamefeather, Frenzy, Headstrong, Jetstorm (Decepticon), Megaplex, Motormaster, Overkill, Quake, Rage, Rampage, Razorclaw, Rumble, Slicer, Slugfest, Tantrum, Vindicator, Wildrider
• Air Wing: Acid Storm, Airwave, Blast Off, Blueshift, Bomb-Burst, Bootleg, Darkwing, Dreadwind, Dust Storm, End Run, Fumarole, Heatstroke, Misfire, Ramjet, Ransack, Skyjack, Skywarp, Smokescreen, Spacecase, Stormfire, Stormhawk, Thrust, Thundercracker, Thunderflare, Tinker, Zephyr

See Combaticons

• Nonaligned: Seawing, Shockwave, Snaptrap, Starscream, Sunstorm

• List of all Decepticons